Spring structure for mattresses



April W, 1941. 1|.. o. COMER 2,2%156 SPRING STRUCTURE FOR MATTRESSES Filed June l5, 1940 www /VEMTOR wm 0 KEINE/i Bgffzyf jacent portion of the loop 6.

Patented Apr. 15, 1941 SPRING STRUCTURE FOR MATTRESSES Lloyd 0. Coiner, Carthage, Mo., assigner to yLeggett and Platt Spring Bed and Manufac-` turing Company, Carthage, Mo.

Application June 15, 1940, Serial No. 340,804

(ci. s-zrs) 2 Claims.

'Ilie object of my invention is to provide a novel arrangement of springs in a mattress having the central section of the mattress provided with an increased number of vertically disposed springs of lighter weight and weaker than the corresponding springs used in the head and foot sections of the mattress, whereby more comfort will be aiiorded the user of the mattress.

It is also an vobject of my invention to provide a modified form of mattress of this type, having a relatively stronger row of vertically disposed springs adjacent each side of the mattress. It is also an object of my invention to provide a mattress of this type having the various spiral springs used connected by a series of small coil springs engaging the successive top spirals and other small coil springs engaging the respective bottom spirals of the main spiral springs.

, I attain these and other objects of my invention by the springs illustrated in the accompanying drawing, in Which- Figure 1 is a top plan view of a portion of one of my mattresses showing the relation of the heavy and light springs;

Fig. 2 is a detail of same on an enlarged scale, a section of the larger springs being broken away to save space on the sheet, and- Fig. 3 is a side elevation of the springs shown in Fig. 2, a portion of the heavier springs also being omitted to save space on the sheet.

Referring to the accompanying drawing, it will be noted that my mattress has a series of relatively heavy spirals forming the head section A, a series of relatively light spirals forming the center section B, and a series of relatively heavy spirals for the foot section C.

Referring to the detailed structure of the mattress, as shown in Figs. 2 and 3, each of the main supporting vertically disposed spirals consists of a bottom loop or spiral I of large diameter, the end 2 of which is wound around the wire to fasten it; successive intermediate spirals 3, 4 and 5 of smaller diameter, and a top loop or spiral 6, the end 'I of which is secured to the ad- The bottom loop 8 of the next adjacent spring is positioned to partly overlie the loop I, and similarly the ad jacent top loop 9 is positioned to partly overlie the top loop 6, as shown in Figs. 2 and 3.

To secure the various main spiral springs together, I provide a relatively long wire coil IIl, a portion II of which is encircled or engaged around the `loop 6, and the portion I2 of which is similarly engaged around the adjacent loop of the adjacent vertical spring, as shown in Fig. 2.

I also provide a series of transverse top wire coils I3 and a corresponding series of transverse bottom wire lcoils I4. The wire coil I3 has a number of its coils I5 encircling the overlying sections of the top spirals 6 and 9; while the bottom transverse coils I4 each have several coils springs at this portion of the mattress, it has `adequate strength to support the users, but that by reason of being lighter weight and weaker springs, they are more resilient and aiord more comfort to the users.

I prefer, but do not require, that the vertically disposed springs adjacent and forming the longitudinal edges of the mattress be of a relatively heavier weight than the remaining springs, and similar springs may, if desired, be provided adjacent the ends of the mattress.

It will also be noted that the top and bottom spirals of each of the spiral springs overlie the top and Ibottom spirals of adjacent springs and that the transverse coils I 3 engage around the overlying portions of these top and bottom spirais, thus insuring that the series of vertical spirals will function as a unit and not spread apart.

What I claim is:

1. A spring structure for mattresses consisting of a spring unit having a head section and a foot section comprising heavy vertical spiral springs, an intermediate section having relatively light vertical spiral springs but with a relatively increased number of springs per unit area over those in the head and foot sections, whereby to increase the resilience of the intermediate section while still furnishing the necessary support.

2. In a mattress oi the type described, like head and foot sections each comprising a serios of vertically disposed relatively heavy spiral springs, an intermediate section having a larger number per unit area of relatively light weight vertically disposed spiral springs to increase the resilience of the intermediate section, the corresponding top and bottom convolutions of adjacent springs being disposed adjacent each other, and a series of top and bottom transverse small diameter coil springs disposed between each row of vertically disposed spiral springs and engaging the overlying portions of the top and bottom convolutions of adjacent springs respectively.

LLOYD O. COINER. 

